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U.S. President Barack Obama looks down as he walks from the rostrum after speaking at a vigil held at Newtown High School for families of victims of the Sandy Hook Elementary School shooting in Newtown, Connecticut December 16, 2012. Obama is visiting Newtown High School to meet with the families of the victims and to thank first responders to the school shooting here that was one of the deadliest such incidents in the nation's history. REUTERS/Kevin Lamarque

US President Barack Obama speaks at a memorial service for the victims of the Sandy Hook Elementary School shooting on December 16, 2012 in Newtown, Connecticut. Obama will address the memorial for the twenty-six people, 20 of them children, who were killed when a gunman entered Sandy Hook Elementary and began a shooting spree. MANDEL NGAN/AFP/Getty Images

NEWTOWN, CT - DECEMBER 16: Isabel Lebron holds son Izaiah Taylor at a memorial with donated Christmas trees honoring victims near the school on the first Sunday following the mass shooting at Sandy Hook Elementary School on December 16, 2012 in Newtown, Connecticut. U.S. President Barack Obama visited the grief stricken town today. (Photo by Mario Tama/Getty Images)

NEWTOWN, CT - DECEMBER 16: U.S. President Barack Obama waves after speaking at an interfaith vigil for the shooting victims from Sandy Hook Elementary School on December 16, 2012 at Newtown High School in Newtown, Connecticut. Twenty-six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza, found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Olivier Douliery-Pool/Getty Images)

Eknoor Kaur, 3, stands with her father Guramril Singh during a candlelight vigil outside Newtown High School before an interfaith vigil with President Barack Obama, Sunday, Dec. 16, 2012, in Newtown, Conn. A gunman walked into Sandy Hook Elementary School in Newtown Friday and opened fire, killing 26 people, including 20 children. (AP Photo/Jason DeCrow)

US President Barack Obama speaks at a memorial service for the victims of the Sandy Hook Elementary School shooting on December 16, 2012 in Newtown, Connecticut. Obama will address the memorial for the twenty-six people, 20 of them children, who were killed when a gunman entered Sandy Hook Elementary and began a shooting spree. MANDEL NGAN/AFP/Getty Images

Members of the Connecticut state police bow their heads during a memorial service for victims of the Sandy Hook Elementary School shooting at Newtown High School in Newtown, Connecticut, U.S., on Sunday, Dec. 16, 2012. Obama arrived in Newtown, Connecticut, two days after the tragedy and as authorities were still trying to piece together a motive for the second-deadliest mass shooting in the U.S. Photographer: Olivier Douliery/Pool via Bloomberg

A man holds a stuffed toy before U.S. President Barack Obama arrives to speak at a memorial service for victims of the Sandy Hook Elementary School shooting at Newtown High School in Newtown, Connecticut, U.S., on Sunday, Dec. 16, 2012. Obama arrived in Newtown, Connecticut, two days after the tragedy and as authorities were still trying to piece together a motive for the second-deadliest mass shooting in the U.S. Photographer: Olivier Douliery/Pool via Bloomberg

Kayla Hopson and her daughter Lilliana, 9, left, and Janine Caswell and her daughter Genesis, 8, stand wrapped in Red Cross blankets to protect themselves from the cold, rainy weather as they wait in line to attend an interfaith vigil with President Barack Obama, Sunday, Dec. 16, 2012, in Newtown, Conn. A gunman walked into Sandy Hook Elementary School in Newtown Friday and opened fire, killing 26 people, including 20 children. (AP Photo/Jason DeCrow)

A couple pays their respects at one of the makeshift memorials in honor of the victims of the Sandy Hook Elementary School shooting, Sunday, Dec. 16, 2012 in Newtown, Conn. A gunman opened fire at the school, killing 26 people, including 20 children before killing himself on Friday. (AP Photo/Mary Altaffer)

Women comfort one another during a vigil held at Newtown High School for families of victims of the Sandy Hook Elementary School shooting in Newtown, Connecticut December 16, 2012. U.S. President Barack Obama is visiting Newtown High School to meet with the families of the victims and to thank first responders to the school shooting here, which was one of the deadliest such incidents in the nation's history. REUTERS/Kevin Lamarque

U.S. President Barack Obama arrives for a vigil held at Newtown High School for families of victims of the Sandy Hook Elementary School shooting in Newtown, Connecticut December 16, 2012. Obama is visiting Newtown High School to meet with the families of the victims and to thank first responders to the school shooting here that was one of the deadliest such incidents in the nation's history. REUTERS/Kevin Lamarque

NEWTOWN, CT - DECEMBER 16: Mourners comfort one another before U.S. President Barack Obama speaks at an interfaith vigil for the shooting victims from Sandy Hook Elementary School on December 16, 2012 at Newtown High School in Newtown, Connecticut. Twenty-six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza, found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Olivier Douliery-Pool/Getty Images)

NEWTOWN, CT - DECEMBER 16: (L to R) Newtown residents Claire Swanson, Ian Fuchs, Kate Suba, Jaden Albrecht, Simran Chand hold candles at a memorial for victims on the first Sunday following the mass shooting at Sandy Hook Elementary School on December 16, 2012 in Newtown, Connecticut. U.S. President Barack Obama visited the grief stricken town today. (Photo by Mario Tama/Getty Images)

NEWTOWN, CT - DECEMBER 16: People gather at a memorial for victims near the school on the first Sunday following the mass shooting at Sandy Hook Elementary School on December 16, 2012 in Newtown, Connecticut. U.S. President Barack Obama visited the grief stricken town today. (Photo by Mario Tama/Getty Images)

NEWTOWN, CT - DECEMBER 16: U.S. President Barack Obama waits to speak at an interfaith vigil for the shooting victims from Sandy Hook Elementary School on December 16, 2012 at Newtown High School in Newtown, Connecticut. Twenty-six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza, found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Olivier Douliery-Pool/Getty Images)

People wait in line to enter Newtown High School for a memorial vigil attended by President Barack Obama for the victims of the Sandy Hook Elementary School shooting, Sunday, Dec. 16, 2012, in Newtown, Conn. A gunman walked into Sandy Hook Elementary School in Newtown Friday and opened fire, killing 26 people, including 20 children. (AP Photo/David Goldman)

Teddy bears, each representing a victim of the Sandy Hook Elementary School shooting, sit on a wall at a sidewalk memorial, Sunday, Dec. 16, 2012, in Newtown, Conn. A gunman walked into Sandy Hook Elementary School in Newtown Friday and opened fire, killing 26 people, including 20 children. (AP Photo/David Goldman)

A U.S. flag flies at half staff outside the Newtown High School before President Barack Obama is scheduled to attend a memorial for the victims of the Sandy Hook Elementary School shooting, Sunday, Dec. 16, 2012, in Newtown, Conn. A gunman walked into Sandy Hook Elementary School in Newtown Friday and opened fire, killing 26 people, including 20 children. (AP Photo/David Goldman)

Residents greet each other before an interfaith vigil for the victims of the Sandy Hook Elementary School shooting on Sunday, Dec. 16, 2012 at Newtown High School in Newtown, Conn. A gunman walked into Sandy Hook Elementary School Friday and opened fire, killing 26 people, including 20 children. (AP Photo/ Evan Vucci)

Residents greet each other before an interfaith vigil for the victims of the Sandy Hook Elementary School shooting on Sunday, Dec. 16, 2012 at Newtown High School in Newtown, Conn. A gunman walked into Sandy Hook Elementary School Friday and opened fire, killing 26 people, including 20 children. (AP Photo/ Evan Vucci)

Candles with the names of shooting victims written on them sit at a memorial near Sandy Hook Elementary School, Sunday, Dec. 16, 2012 in Newtown, Conn. A gunman walked into Sandy Hook Elementary School in Newtown Friday and opened fire, killing 26 people, including 20 children. (AP Photo/Jason DeCrow)

Angles dangle from a tree in front of St. Rose of Lima Roman Catholic Church before Mass, on Sunday, Dec. 16, 2012, in Newtown, Conn. A gunman walked into Sandy Hook Elementary School in Newtown Friday and opened fire, killing 26 people, including 20 children. (AP Photo/Julio Cortez)

David Freedman, right, kneels with his son Zachary, 9, both of Newtown, Conn., as they visit a sidewalk memorial for the Sandy Hook Elementary School shooting victims, Sunday, Dec. 16, 2012, in Newtown, Conn. A gunman walked into Sandy Hook Elementary School in Newtown Friday and opened fire, killing 26 people, including 20 children. (AP Photo/David Goldman)

People arrive on a school bus at Newtown High School for a memorial vigil attended by President Barack Obama for the victims of the Sandy Hook Elementary School shooting, Sunday, Dec. 16, 2012, in Newtown, Conn. A gunman walked into Sandy Hook Elementary School in Newtown Friday and opened fire, killing 26 people, including 20 children. (AP Photo/David Goldman)

A woman pays respects at a memorial outside of St. Rose of Lima Roman Catholic Church, Sunday, Dec. 16, 2012, in Newtown, Conn. On Friday, a gunman allegedly killed his mother at their home and then opened fire inside the Sandy Hook Elementary School in Newtown, killing 26 people, including 20 children. (AP Photo/Julio Cortez)

A man covers his face with his hands at a memorial near Sandy Hook Elementary School in Newtown, Connecticut December 16, 2012. Twelve girls, eight boys and six adult women were killed in a shooting on Friday at the Sandy Hook Elementary School in Newtown. REUTERS/Eric Thayer

A sign for victims of the Sandy Hook Elementary shooting hangs in the window of a women's dress shop in Newtown, Connecticut December 16, 2012. Worshippers filled Sunday services to mourn the victims of a gunman's elementary school rampage that killed 20 children and six adults with President Barack Obama due to appear later at an interfaith vigil to help this shattered Connecticut town recover. REUTERS/Adrees Latif

A memorial to victims of a school shooting of 27 small U.S. flags stands in the rain on the side of Interstate 84 in Newtown, Connecticut December 16, 2012. Worshippers filled Sunday services to mourn the victims of a gunman's rampage at Sandy Hook Elementary School that killed 20 children and six adults with the president due to appear later at an interfaith vigil to help this shattered Connecticut town recover. REUTERS/Lucas Jackson

The names of the victims of the Sandy Hook Elementary shooting are seen on an U.S. flag in the town center of Sandy Hook Village in Newtown, Connecticut December 16, 2012. Worshippers filled Sunday services to mourn the victims of a gunman's elementary school rampage that killed 20 children and six adults with the president due to appear later at an interfaith vigil to help this shattered Connecticut town recover. REUTERS/Adrees Latif

People react at a makeshift memorial near Sandy Hook Elementary School, where a mass shooting took place, in Newtown, Connecticut December 16, 2012. Worshippers filled Sunday services to mourn the victims of a gunman's rampage at the school that killed 20 children and six adults with President Barack Obama due to appear later at an interfaith vigil to help this shattered Connecticut town recover. REUTERS/Eric Thayer

People react at a makeshift memorial near Sandy Hook Elementary School, where a mass shooting took place, in Newtown, Connecticut December 16, 2012. Worshippers filled Sunday services to mourn the victims of a gunman's rampage at the school that killed 20 children and six adults with President Barack Obama due to appear later at an interfaith vigil to help this shattered Connecticut town recover. REUTERS/Eric Thayer

A woman reacts at a makeshift memorial near Sandy Hook Elementary School, where a mass shooting took place, in Newtown, Connecticut December 16, 2012. Worshippers filled Sunday services to mourn the victims of a gunman's rampage at the school that killed 20 children and six adults with President Barack Obama due to appear later at an interfaith vigil to help this shattered Connecticut town recover. REUTERS/Eric Thayer

A mother embraces her daughter as they stand at a makeshift memorial near Sandy Hook Elementary School for the victims of a school shooting in Newtown, Connecticut December 16, 2012. Twelve girls, eight boys and six adult women were killed in the shooting on Friday at the Sandy Hook Elementary School in Newtown. REUTERS/Mike Segar

The Kulish family from New Britain, Connecticut, plays Christmas carols near a makeshift memorial close to Sandy Hook Elementary School for the victims of a school shooting in Newtown, Connecticut Sunday December 16, 2012. Twelve girls, eight boys and six adult women were killed in the shooting on Friday at the Sandy Hook Elementary School in Newtown. REUTERS/Mike Segar

Members of the Philadelphia Little Flyers hockey team arrive with wreaths to place at a memorial for the shooting victims near Sandy Hook Elementary School in Newtown, Connecticut December 16, 2012. REUTERS/ Michelle McLoughlin

Mourners react as they stand in front of a memorial for victims of the recent mass shooting in Sandy Hook village in Newtown, Connecticut December 16, 2012. Worshippers filled Sunday services to mourn the victims of a gunman's rampage at Sandy Hook elementary school in Newtown that killed 20 children and six adults with President Barack Obama due to appear later at an interfaith vigil to help this shattered Connecticut town recover. REUTERS/Lucas Jackson

A woman weeps while looking at a memorial to the victims of the recent shooting in Sandy Hook Village in Newtown, Connecticut, December 16, 2012. Twelve girls, eight boys and six adult women were killed in a shooting on Friday at Sandy Hook Elementary School in Newtown. REUTERS/Lucas Jackson

A man hugs his dog while paying his respects at a memorial to the victims of the recent shooting in Sandy Hook Village in Newtown, Connecticut, December 16, 2012. Twelve girls, eight boys and six adult women were killed in a shooting on Friday at Sandy Hook Elementary School in Newtown. REUTERS/Lucas Jackson

People mourn at a makeshift memorial near Sandy Hook Elementary School in Newtown, Connecticut, December 16, 2012. Twelve girls, eight boys and six adult women were killed in the shooting on Friday at the Sandy Hook Elementary School in Newtown. REUTERS/Eric Thayer

A family embraces while visiting a memorial to the victims of the recent school shooting in Sandy Hook Village in Newtown, Connecticut, December 16, 2012. Worshippers filled Sunday services to mourn the victims of a gunman's elementary school rampage that killed 20 children and six adults with President Barack Obama due to appear later at an interfaith vigil to help this shattered Connecticut town recover. REUTERS/Lucas Jackson

A woman wipes her eye as she visits a makeshift memorial near Sandy Hook Elementary School in Newtown, Connecticut, December 16, 2012. Twelve girls, eight boys and six adult women were killed in the shooting on Friday at the Sandy Hook Elementary School in Newtown. REUTERS/Eric Thayer

A woman lights candles at a memorial for victims of the Sandy Hook Elementary shooting near the school in Sandy Hook Village in Newtown, Connecticut December 16, 2012. Worshippers filled Sunday services to mourn the victims of a gunman's elementary school rampage that killed 20 children and six adults with the president due to appear later at an interfaith vigil to help this shattered Connecticut town recover. REUTERS/Adrees Latif

A woman grieves after visiting a memorial for victims of the Sandy Hook Elementary shooting near the school in Sandy Hook Village in Newtown, Connecticut December 16, 2012. Worshippers filled Sunday services to mourn the victims of a gunman's elementary school rampage that killed 20 children and six adults with the president due to appear later at an interfaith vigil to help this shattered Connecticut town recover. REUTERS/Adrees Latif

The names of victims are written on the lights of a small Christmas tree at a memorial to the victims of the recent shooting in Sandy Hook Village in Newtown, Connecticut, December 16, 2012. Twelve girls, eight boys and six adult women were killed in a shooting on Friday at Sandy Hook Elementary School in Newtown. REUTERS/Lucas Jackson

A candle with the names of victims written on it left among stuffed animals and candles in a memorial to the victims of the recent school shooting in Sandy Hook village in Newtown, Connecticut, December 16, 2012. Worshippers filled Sunday services to mourn the victims of a gunman's elementary school rampage that killed 20 children and six adults with President Barack Obama due to appear later at an interfaith vigil to help this shattered Connecticut town recover. REUTERS/Lucas Jackson

A young girl touches a candle at a memorial to the victims of the recent shooting in Sandy Hook Village in Newtown, Connecticut, December 16, 2012. Twelve girls, eight boys and six adult women were killed in a shooting on Friday at Sandy Hook Elementary School in Newtown. REUTERS/Lucas Jackson

The names of victims from the Sandy Hook Elementary shooting are placed on teddy bears left at a memorial in Sandy Hook Village in Newtown, Connecticut December 16, 2012. Worshippers filled Sunday services to mourn the victims of a gunman's elementary school rampage that killed 20 children and six adults with the president due to appear later at an interfaith vigil to help this shattered Connecticut town recover. REUTERS/Adrees Latif

Twenty-seven wood painted angels are displayed outside of a home to honor the victims killed at Sandy Hook Elementary School in Newtown, Connecticut December 16, 2012. Twelve girls, eight boys and six adult women were killed in the shooting on Friday at Sandy Hook Elementary School in Newtown. REUTERS/Joshua Lott

A woman walks over a freeway overpass near a memorial for the victims of the recent shooting in Sandy Hook Village in Newtown, Connecticut, December 16, 2012. Twelve girls, eight boys and six adult women were killed in a shooting on Friday at Sandy Hook Elementary School in Newtown. REUTERS/Lucas Jackson

A Buddhist monk from Thailand leaves flowers for victims of the Sandy Hook Elementary shooting at a memorial in Sandy Hook Village in Newtown, Connecticut December 16, 2012. Worshippers filled Sunday services to mourn the victims of a gunman's elementary school rampage that killed 20 children and six adults with President Barack Obama due to appear later at an interfaith vigil to help this shattered Connecticut town recover. REUTERS/Adrees Latif

Women embrace at a vigil held at Newtown High School for families of the Sandy Hook Elementary School shooting victims in Newtown, Connecticut December 16, 2012. U.S. President Barack Obama is visiting Newtown High School to meet with the families of the victims and to thank first responders to the school shooting here, which was one of the deadliest such incidents in the nation's history. REUTERS/Kevin Lamarque

A young man is comforted during a vigil held at Newtown High School for families of victims of the Sandy Hook Elementary School shooting in Newtown, Connecticut December 16, 2012. U.S. President Barack Obama is visiting Newtown High School to meet with the families of the victims and to thank first responders to the school shooting here, which was one of the deadliest such incidents in the nation's history. REUTERS/Kevin Lamarque

A young man is comforted during a vigil held at Newtown High School for families of victims of the Sandy Hook Elementary School shooting in Newtown, Connecticut December 16, 2012. U.S. President Barack Obama is visiting Newtown High School to meet with the families of the victims and to thank first responders to the school shooting here, which was one of the deadliest such incidents in the nation's history. REUTERS/Kevin Lamarque

Firefighters and other volunteers reorganize a memorial for shooting victims near Sandy Hook Elementary School before erecting a shelter over it, Sunday, Dec. 16, 2012 in Newtown, Conn. A gunman walked into Sandy Hook Elementary School in Newtown Friday and opened fire, killing 26 people, including 20 children. (AP Photo/Jason DeCrow)

A girl holds a stuffed animal given to her by the Red Cross during a vigil held at Newtown High School for families of victims of the Sandy Hook Elementary School shooting in Newtown, Connecticut December 16, 2012. U.S. President Barack Obama is visiting Newtown High School to meet with the families of the victims and to thank first responders to the school shooting here that was one of the deadliest such incidents in the nation's history. REUTERS/Kevin Lamarque

NEWTOWN, CT - DECEMBER 16: Members of Sisters of Christian Charity walk to lay flowers in front of the Sandy Hook School December 16, 2012 in Newtown, Connecticut. Twenty-six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza, found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Spencer Platt/Getty Images)

NEWTOWN, CT - DECEMBER 16: Teddy bears and flowers, in memory of those killed, are left at a memorial down the street from the Sandy Hook School December 16, 2012 in Newtown, Connecticut. Twenty-six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza, found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Spencer Platt/Getty Images)

NEWTOWN, CT - DECEMBER 16: Teddy bears, flowers and candles in memory of those killed, are left at a memorial down the street from the Sandy Hook School December 16, 2012 in Newtown, Connecticut. Twenty-six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza, found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Spencer Platt/Getty Images)

NEWTOWN, CT - DECEMBER 16: Teddy bears, flowers and candles in memory of those killed, are left at a memorial down the street from the Sandy Hook School December 16, 2012 in Newtown, Connecticut. Twenty-six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza, found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Spencer Platt/Getty Images)

NEWTOWN, CT - DECEMBER 16: Twenty seven wooden stand in a yard down the street from the Sandy Hook School December 16, 2012 in Newtown, Connecticut. Twenty-six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza, found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Spencer Platt/Getty Images)

NEWTOWN, CT - DECEMBER 16: Twenty seven wooden angles stand in a yard down the street from the Sandy Hook School December 16, 2012 in Newtown, Connecticut. Twenty-six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza, found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Spencer Platt/Getty Images)

NEWTOWN, CT - DECEMBER 16: A message is left on a highway overpass in remembrance of those killed down the street from the Sandy Hook School December 16, 2012 in Newtown, Connecticut. Twenty-six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza, found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Spencer Platt/Getty Images)

NEWTOWN, CT - DECEMBER 16: People reflect at a memorial down the street from the Sandy Hook School December 16, 2012 in Newtown, Connecticut. Twenty-six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza, found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Spencer Platt/Getty Images)

NEWTOWN, CT - DECEMBER 16: (L-R) Newtown residents Claire Swanson, Kate Suba, Jaden Albrecht, Simran Chand and New London, Connecticut residents Rachel Pullen and her son Landon DeCecco, hold candles at a memorial for victims on the first Sunday following the mass shooting at Sandy Hook Elementary School on December 16, 2012 in Newtown, Connecticut. U.S. President Barack Obama visited the grief stricken town today. (Photo by Mario Tama/Getty Images)

NEWTOWN, CT - DECEMBER 16: Mourners comfort one another before U.S. President Barack Obama speaks at an interfaith vigil for the shooting victims from Sandy Hook Elementary School on December 16, 2012 at Newtown High School in Newtown, Connecticut. Twenty-six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza, found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Olivier Douliery-Pool/Getty Images)

NEWTOWN, CT - DECEMBER 16: New London, Connecticut resident Rachel Pullen (C) kisses her son Landon DeCecco at a memorial for victims near the school on the first Sunday following the mass shooting at Sandy Hook Elementary School on December 16, 2012 in Newtown, Connecticut. U.S. President Barack Obama visited the grief stricken town today. (Photo by Mario Tama/Getty Images)

NEWTOWN, CT - DECEMBER 16: Mourners comfort one another before U.S. President Barack Obama speaks at an interfaith vigil for the shooting victims from Sandy Hook Elementary School on December 16, 2012 at Newtown High School in Newtown, Connecticut. Twenty-six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza, found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Olivier Douliery-Pool/Getty Images)

NEWTOWN, CT - DECEMBER 16: Mourners comfort one another before U.S. President Barack Obama speaks at an interfaith vigil for the shooting victims from Sandy Hook Elementary School on December 16, 2012 at Newtown High School in Newtown, Connecticut. Twenty-six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza, found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Olivier Douliery-Pool/Getty Images)

NEWTOWN, CT - DECEMBER 16: A mourner cries before U.S. President Barack Obama speaks at an interfaith vigil for the shooting victims from Sandy Hook Elementary School on December 16, 2012 at Newtown High School in Newtown, Connecticut. Twenty-six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza, found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Olivier Douliery-Pool/Getty Images)

NEWTOWN, CT - DECEMBER 16: Children play video games while waiting for U.S. President Barack Obama to speak at an interfaith vigil for the shooting victims from Sandy Hook Elementary School on December 16, 2012 at Newtown High School in Newtown, Connecticut. Twenty-six people were shot dead, including twenty children, after a gunman identified as Adam Lanza opened fire at Sandy Hook Elementary School. Lanza also reportedly had committed suicide at the scene. A 28th person, believed to be Nancy Lanza, found dead in a house in town, was also believed to have been shot by Adam Lanza. (Photo by Olivier Douliery-Pool/Getty Images)

A teenager decorates Christmas trees set up at a makeshift shrine to the victims of a elementary school shooting in Newtown, Connecticut, December 16, 2012. A young gunman slaughtered 20 small children and six teachers on December 14,2012 after walking into a school in an idyllic Connecticut town wielding at least two sophisticated firearms. EMMANUEL DUNAND/AFP/Getty Images

People leave after paying their repsects at makeshift shrine to the victims of a elementary school shooting in Newtown, Connecticut, December 16, 2012. A young gunman slaughtered 20 small children and six teachers on December 14,2012 after walking into a school in an idyllic Connecticut town wielding at least two sophisticated firearms. EMMANUEL DUNAND/AFP/Getty Images

Two teenagers grieve while paying their respects at a makeshift shrine to the victims of a elementary school shooting in Newtown, Connecticut, December 16, 2012. A young gunman slaughtered 20 small children and six teachers on December 14,2012 after walking into a school in an idyllic Connecticut town wielding at least two sophisticated firearms. EMMANUEL DUNAND/AFP/Getty Images

A pair of angel wings and balloons stand after being offered at a makeshift shrine to the victims of a elementary school shooting in Newtown, Connecticut, December 16, 2012. A young gunman slaughtered 20 small children and six teachers on December 14,2012 after walking into a school in an idyllic Connecticut town wielding at least two sophisticated firearms. EMMANUEL DUNAND/AFP/Getty Images

A young boy decorates Christmas trees set up at a makeshift shrine to the victims of a elementary school shooting in Newtown, Connecticut, December 16, 2012. A young gunman slaughtered 20 small children and six teachers on December 14,2012 after walking into a school in an idyllic Connecticut town wielding at least two sophisticated firearms. EMMANUEL DUNAND/AFP/Getty Images

Twenty seven angel wood cut-outs are set up on hillside in memory to the victims of an elementary school shooting in Newtown, Connecticut, December 16, 2012. A young gunman slaughtered 20 small children and six teachers on December 14,2012 after walking into a school in an idyllic Connecticut town wielding at least two sophisticated firearms. He also killed his mum and himself. EMMANUEL DUNAND/AFP/Getty Images

People pay their respects at a makeshift shrine to the victims of a elementary school shooting in Newtown, Connecticut, December 16, 2012. A young gunman slaughtered 20 small children and six teachers on December 14, 2012 after walking into a school in an idyllic Connecticut town wielding at least two sophisticated firearms. EMMANUEL DUNAND/AFP/Getty Images

People pay respects by a makeshift memorial outside of St. Rose of Lima Roman Catholic Church between Mass services, Sunday, Dec. 16, 2012, in Newtown, Conn. On Friday, a gunman allegedly killed his mother at their home and then opened fire inside the Sandy Hook Elementary School, killing 26 people, including 20 children. (AP Photo/Julio Cortez)

Josue Gonzales, right, embraces Lindsay Zawesza, as they wait in line to enter Newtown High School for a memorial vigil attended by President Barack Obama for the victims of the Sandy Hook Elementary School shooting, Sunday, Dec. 16, 2012, in Newtown, Conn. A gunman walked into Sandy Hook Elementary School in Newtown Friday and opened fire, killing 26 people, including 20 children. (AP Photo/David Goldman)

Brian Wallace, right, spokesman for the Diocese of Bridgeport, speaks to reporters after a bomb threat at St. Rose of Lima Roman Catholic Church, Sunday, Dec. 16, 2012 in Newtown, Conn. Worshippers hurriedly left the church Sunday, not far from where a gunman opened fire Friday inside the Sandy Hook Elementary School in Newtown. Police later said nothing dangerous was found. (AP Photo/Mary Altaffer)

Women react while waiting in a vehicle to drive away from St. Rose of Lima Roman Catholic Church as officials respond to a bomb threat, Sunday, Dec. 16, 2012, in Newtown, Conn. Worshippers hurriedly left the church Sunday, not far from where a gunman opened fire Friday inside the Sandy Hook Elementary School in Newtown. (AP Photo/Julio Cortez)

Mourners embrace before a memorial service for victims of the shooting at Sandy Hook Elementary School in the auditorium of Newtown High School in Newtown, Conn., Dec. 16, 2012. President Barack Obama will speak at the memorial and meet privately with families and first responders. (Luke Sharrett/The New York Times)

Mourners embrace before a memorial service for victims of the shooting at Sandy Hook Elementary School in the auditorium of Newtown High School in Newtown, Conn., Dec. 16, 2012. President Barack Obama will speak at the memorial and meet privately with families and first responders. (Luke Sharrett/The New York Times)

A message of thanks and prayer is displayed outside a home in the wake of a deadly school shooting, Sunday, Dec. 16, 2012, in Newtown, Conn. A gunman walked into Sandy Hook Elementary School in Newtown on Friday and opened fire, killing 26 people, including 20 children. (AP Photo/Jason DeCrow)

Candles, balloons, stuffed animals and personal notes are placed on a memorial for the victims of the Sandy Hook Elementary School shooting, Sunday, Dec. 16, 2012, in the Sandy Hook village of Newtown, Conn. A gunman walked into Sandy Hook Elementary School in Newtown Friday and opened fire, killing 26 people, including 20 children. (AP Photo/Mary Altaffer)

A woman reacts while paying respects for shooting victims at a makeshift memorial at St. Rose of Lima Roman Catholic Church, Sunday, Dec. 16, 2012, in Newtown, Conn. On Friday, a gunman allegedly killed his mother at their home and then opened fire inside the Sandy Hook Elementary School in Newtown, killing 26 people, including 20 children. (AP Photo/Julio Cortez)

A man reacts at the site of a makeshift memorial for school shooting victims in Newtown, Conn., Sunday, Dec. 16, 2012. A gunman opened fire at Sandy Hook Elementary School in the town, killing 26 people, including 20 children before killing himself on Friday. (AP Photo/Charles Krupa)

In a four-photo combination, representatives of different faiths and President Barack Obama speaks during an interfaith service at Newtown High School in memory of the victims of the mass shooting at Sandy Hook Elementary School, in Newtown, Conn., Dec. 16, 2012. Obama spoke after representatives from many faiths offered prayers at the service and Connecticut Gov. Dan Malloy offered words of support. (Luke Sharrett/The New York Times)

Photos: Connecticut Shooting – Vigil and Memorial Services

Mourners crowded a memorial service for victims of the shooting at Sandy Hook Elementary School in the auditorium of Newtown High School in Newtown, Conn., Dec. 16, 2012. President Barack Obama spoke at the memorial and met privately with families and first responders.